DIN CEN/TS 14417; DIN SPEC 60017:2014-12
Geosynthetic barriers - Test method for the determination of the influence of wetting-drying cycles on the permeability of clay geosynthetic barriers; German version CEN/TS 14417:2014
Geosynthetische Dichtungsbahnen - Prüfverfahren zur Bestimmung des Einflusses von Nass-Trocken-Zyklen auf die Wasserdurchlässigkeit von geosynthetischen Tondichtungsbahnen; Deutsche Fassung CEN/TS 14417:2014
This Technical Specification defines a method for testing the influence ratio of wetting-drying cycles on the flux through clay geosynthetic barriers. Such resistance is a requirement for many uses of these products. The influence ratio is an indication of the behaviour of the product when exposed to repeated wetting and drying cycles in earth constructions. The flux of saturated clay geosynthetic barriers can increase after exposure to repeated wetting-drying cycles. This Technical Specification does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to comply with any regulations or legislation regardless of the wording in the Technical Specification. The flux determined using this test method is not considered to be representative of the in-service flux of clay geosynthetic barriers. This test determines the influence of wetting-drying cycles in the absence of any other phenomenon, for example cation exchange. This document describes an index test to determine the influence ratio of wetting-drying cycles on the flux through saturated clay geosynthetic barrier specimens. This test method is applicable to GBR-C products with no additional sealing layers attached. The committee responsible for this standard is NA 106-01-11 AA "Geotextilien und Geokunststoffe; SpA zu CEN/TC 189 und ISO/TC 221" ("Geotextiles and geosynthetics; Mirror Committee of CEN/TC 189 and ISO/TC 221") at DIN.